CN103162752A - Detection device and method for phase encoding synchronous time difference of ultrasonic flowmeter - Google Patents
Detection device and method for phase encoding synchronous time difference of ultrasonic flowmeter Download PDFInfo
- Publication number
- CN103162752A CN103162752A CN2013100473956A CN201310047395A CN103162752A CN 103162752 A CN103162752 A CN 103162752A CN 2013100473956 A CN2013100473956 A CN 2013100473956A CN 201310047395 A CN201310047395 A CN 201310047395A CN 103162752 A CN103162752 A CN 103162752A
- Authority
- CN
- China
- Prior art keywords
- ultrasonic transducer
- correlator
- ultrasonic
- fluid
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a detection device and a method for phase encoding synchronous time difference of an ultrasonic flowmeter. A pair of ultrasonic transducers is used as a signal sending-receiving probe group and is respectively mounted on two sides of a pipeline with a certain distance; a measurement period of the synchronous time difference detection method comprises two processes, namely controlling the two ultrasonic transducers to be simultaneously used as a sending end to send 13-bit barker code signals of different frequencies and controlling the two ultrasonic transducers to stop sending signals and wait to receive signals, and using relevant processing methods, the time for the first ultrasonic transducer to send signals to the second ultrasonic transducer can be precisely measured and recorded, and the time for the second ultrasonic transducer to send signals to the first ultrasonic transducer can be precisely measured and recorded. According to the data, combining with geometric information, flow velocity and flow quantity can be calculated. Compared with a traditional time difference method, the detection method can meet the requirements of the time-difference method ultrasonic flowmeter on high measurement precision.
Description
Technical field
The present invention relates to the ultrasonic flow meter technology, device for detecting difference and method when particularly a kind of phase encoding for ultrasonic flow meter is synchronous.
Background technology
With respect to mechanical flowmeter and electromagnetic type flow meter, ultrasonic flow meter has plurality of advantages: measuring accuracy is high, the strong adaptability to caliber, non-contact measurement, easy to use and be easy to digital management etc.Development along with piezoelectric ceramic technology, electronic technology and high-speed digital signal treatment technology, the performance of ultrasonic flow meter has had large increase, manufacturing cost also significantly descends simultaneously, so ultrasonic flow meter is widely applied in industrial circle and daily life.
Mostly adopt at present time difference method to carry out input in the design of ultrasonic flow meter, the below simply introduces the detection principle of transit time ultrasonic flow meters.The transit time ultrasonic flow meters principle of work as shown in Figure 1, it is to utilize a pair of ultrasonic transducer transmitting-receiving ultrasound wave, measure the flow velocity of fluid by measuring ultrasound wave propagation time difference of following current and adverse current in fluid, then come a kind of indirect measurement method of calculated flow rate by flow velocity.
Two ultrasonic transducers are arranged in accompanying drawing 1: transducer A and transducer B, two transducers are arranged on respectively the both sides of fluid line and at a distance of certain distance, the interior diameter of pipeline is D, and the path of ultrasonic propagation is L, and the time that the ultrasound wave following current is propagated is t
1, the time that adverse current is propagated is t
2, the flow direction angle of hyperacoustic direction of propagation and fluid is θ.Due to Fluid Flow in A, it is short that the time more used than the adverse current distance of L length time used is propagated in the ultrasound wave following current, and the fluid-velocity survey principle can represent with following formula:
Wherein: c is the velocity of propagation of ultrasound wave in fluid media (medium), and V is the flowing velocity of target fluid.
Two formulas in formula (1) are subtracted each other the mistiming Δ t that can obtain following current propagation and adverse current propagation:
Due to rate of flow of fluid with ultrasound wave the velocity of propagation in medium to compare be indivisible, so formula (2) can be reduced to:
Thereby the flow velocity that draws fluid is:
After recording flow velocity, by calculating the sectional area of pipeline, can draw that in pipe, flow is:
Wherein: Q is flow, and V is flow velocity, and D is the interior diameter of pipeline.
Existing transit time ultrasonic flow meters is carrying out the time difference when detecting, and two kinds of methods below usually adopting: method one: adopt a pair of ultrasonic transducer A and transducer B(as shown in Figure 1), testing process is as follows:
1) ultrasonic transducer A is as transmitting terminal, and transducer B controls transducer A and transmits as receiving end, then detects the signal that transducer B receives, and draws the ultrasound wave time t that following current is propagated in fluid
1
2) ultrasonic transducer B is as transmitting terminal, and transducer A controls transducer B and transmits as receiving end, then detects the signal that transducer A receives, and draws the ultrasound wave time t that adverse current is propagated in fluid
2
3) calculate the mistiming Δ t=t that the ultrasound wave co-current flow and counter-current flow is propagated
2-t
1
Method two: adopt two couples of ultrasonic transducer A and transducer B, transducer C and transducer D(are as shown in Figure 2), testing process is as follows:
1) ultrasonic transducer A is as transmitting terminal, and transducer B controls transducer A and transmits as receiving end, then detects the signal that transducer B receives, and draws the ultrasound wave time t that following current is propagated in fluid
1Ultrasonic transducer C is as transmitting terminal simultaneously, and transducer D controls transducer C and transmits as receiving end, then detects the signal that transducer D receives, and draws the ultrasound wave time t that adverse current is propagated in fluid
2
2) calculate the mistiming Δ t=t that adverse current travel-time and following current are propagated
2-t
1
Consider the applicable cases in reality, the deficiency that during respectively from existing two kinds of measuring accuracy, power consumption and manufacturing cost respects, difference detection method exists:
Method one measures the propagation that a time difference value needs ultrasound wave once to come and go in target fluid, if the inhomogeneous variation simultaneously of the flow velocity of target fluid is more frequent, method is not high once the time difference value real-time that measures so, the flow velocity real-time that calculates thus is not high yet, and the flow accuracy that calculates at last is not high yet.
Method two uses two pairs of ultrasonic transducers to measure, although can shorten the time that measures a time difference value like this, but increased the complexity of control and testing circuit, simultaneously also can strengthen the power consumption of whole flowmeter, power consumption is also an important indicator must considering in design in actual applications.
In actual applications, manufacturing cost is also to weigh the major criterion of a design quality, and method two has used two pairs of transducers, and control and testing circuit complexity are very high simultaneously, when increasing power consumption, have also increased manufacturing cost.
Summary of the invention
Device for detecting difference and method when the object of the present invention is to provide a kind of phase encoding for ultrasonic flow meter synchronous.The subject matter that solves is how to make transit time ultrasonic flow meters satisfy simultaneously measuring accuracy problem high, low in energy consumption.
The technical solution adopted for the present invention to solve the technical problems is:
the present invention proposes a kind of phase encoding for ultrasonic flow meter device for detecting difference when synchronous, comprising: the first ultrasonic transducer, the second ultrasonic transducer, the first correlator, the second correlator, the first display, second display, code generator, the first ultrasonic transducer and the second ultrasonic transducer, be bolted on the both sides of fluid line tube wall and mutually stagger, the interior diameter of pipeline is D, the path of ultrasonic propagation is L(L＞D), the flow direction angle of the direction of ultrasonic propagation and fluid is θ (0 °＜θ＜90 °), the first ultrasonic transducer is connected with the first correlator, the second ultrasonic transducer is connected with the second correlator, the first correlator is connected with the first display, the second correlator is connected with second display, the code generator respectively with the first ultrasonic transducer, the second ultrasonic transducer, the first correlator, the second correlator connects.
The first ultrasonic transducer and the second ultrasonic transducer are identical ultrasonic transducer; The first correlator and the second correlator are two identical correlators; Display and display are two identical displays.
Correlator is comprised of some identical branch circuit parallel connections, and every multiplier of route and a low-pass filter are composed in series.
Ultrasonic transducer adopts the 200K-75KHz underwater acoustic transducer of Hangzhou An Buleila robotization Science and Technology Ltd., and model is XIHUW-75/200-E.
Difference detection method when a kind of phase encoding for ultrasonic flow meter is synchronous, step is as follows:
The first step: the code generator produce 13 Barker code signals and from 13 different time delayses that the Barker code signal is corresponding, will be from different time delayses corresponding to 13 Barker code signals as different reference signals, and the corresponding different time; The code generator will produce 13 Barker code signals and pass to respectively the first ultrasonic transducer and the second ultrasonic transducer, and pass to respectively the first correlator, the second correlator with reference to signal.
Second step: the first ultrasonic transducer and the second ultrasonic transducer produce 13 Barker code signals as transmitting terminal transmitter code generator simultaneously.
The 3rd step: the first ultrasonic transducer receives the signal of the second ultrasonic transducer emission as receiving end, and the second ultrasonic transducer receives the signal of the first ultrasonic transducer emission as receiving end.
The 4th step: in correlator, identical with the time delay of code generator when 13 travel-times of Barker code signal in fluid that receive, the output signal of this branch road is maximum, the main peak of respective distances autocorrelation function, this moment, this branch road was the travel-time of ultrasound wave in fluid corresponding time delay, and the following current travel-time is designated as t
1Be designated as t with the adverse current travel-time
2
The 5th step: calculate the mistiming Δ t=t that the ultrasound wave co-current flow and counter-current flow is propagated
2-t
1
The 6th step: utilize the mistiming Δ t that calculates in the 5th step, according to
Can calculate the flow velocity V of detected fluid.
The 7th step: utilize the flow velocity V of the detected fluid that draws in the 6th step, according to
Can calculate fluid flow Q.
The beneficial effect that the present invention has is:
Different with the common time difference detection method that adopts, when the phase encoding for ultrasonic flow meter provided by the invention is synchronous, device for detecting difference and method can reduce ultrasound wave in the impact of Propagation velocity variations, adopt simultaneously the relevant treatment method to measure ultrasound wave following current propagation and adverse current travel-time, can significantly improve the measuring accuracy of ultrasonic flow meter.During with tradition, difference detection method is compared, and the present invention also satisfies the demand of low-power consumption, for the design of transit time ultrasonic flow meters provides a kind of more applicable detection method.What the method was launched is the ultrasonic signal of different frequency, can effectively avoid ultrasound wave to produce the impact that standing wave causes measurement result in mutually propagating.
Description of drawings
Fig. 1 is the measuring principle schematic diagram of transit time ultrasonic flow meters.
Fig. 2 adopts two pairs of ultrasonic transducers to realize the measuring principle schematic diagram of transit time ultrasonic flow meters.
Fig. 3 is the measuring principle schematic diagram of the synchronous time difference detection method ultrasonic flow meter of phase encoding modulation.
Fig. 4 is the relevant treatment principle schematic.
Fig. 5 is the autocorrelation function of 13 Barker codes.
Fig. 6 be display output apart from autocorrelation function.
Embodiment
in conjunction with Fig. 3, Fig. 4 and Fig. 5, the present invention proposes a kind of phase encoding for ultrasonic flow meter device for detecting difference when synchronous, comprising: the first ultrasonic transducer 1, the second ultrasonic transducer 2, the first correlator 3, the second correlator 4, the first display 5, second display 6, code generator 7, the first ultrasonic transducer 1 and the second ultrasonic transducer 2, be bolted on the both sides of fluid line tube wall and mutually stagger, the interior diameter of pipeline is D, the path of ultrasonic propagation is L(L＞D), the flow direction angle of the direction of ultrasonic propagation and fluid is θ (0 °＜θ＜90 °), the first ultrasonic transducer 1 is connected with the first correlator 3, the second ultrasonic transducer 2 is connected with the second correlator 4, the first correlator 3 is connected with the first display 5, the second correlator 4 is connected with second display 6, the code generator 7 respectively with the first ultrasonic transducer 1, the second ultrasonic transducer 2, the first correlator 3, the second correlator 4 connects.
The first ultrasonic transducer 1 and the second ultrasonic transducer 2 are identical ultrasonic transducer; The first correlator 3 and the second correlator 4 are two identical correlators; Display 5 and display 6 are two identical displays.
Correlator is comprised of some identical branch circuit parallel connections, and every multiplier of route and a low-pass filter are composed in series.
Ultrasonic transducer adopts the 200K-75KHz underwater acoustic transducer of Hangzhou An Buleila robotization Science and Technology Ltd., and model is XIHUW-75/200-E.
Difference detection method when a kind of phase encoding for ultrasonic flow meter is synchronous, step is as follows:
The first step: the code generator produce 13 Barker code signals and from 13 different time delayses that the Barker code signal is corresponding, will be from different time delayses corresponding to 13 Barker code signals as different reference signals, and the corresponding different time; The code generator will produce 13 Barker code signals and pass to respectively the first ultrasonic transducer 1 and the second ultrasonic transducer 2, and pass to respectively the first correlator 3, the second correlator 4 with reference to signal.
Second step: the first ultrasonic transducer 1 and the second ultrasonic transducer 2 produce 13 Barker code signals as transmitting terminal transmitter code generator simultaneously.
The 3rd step: the first ultrasonic transducer 1 receives the signal of the second ultrasonic transducer 2 emissions as receiving end, and the second ultrasonic transducer 2 receives the signal of the first ultrasonic transducer 1 emission as receiving end.
The 4th step: in correlator, identical with the time delay of code generator when 13 travel-times of Barker code signal in fluid that receive, the output signal of this branch road is maximum, the main peak of respective distances autocorrelation function, this moment, this branch road was the travel-time of ultrasound wave in fluid corresponding time delay, and the following current travel-time is designated as t
1Be designated as t with the adverse current travel-time
2
The 5th step: calculate the mistiming Δ t=t that the ultrasound wave co-current flow and counter-current flow is propagated
2-t
1
The 6th step: utilize the mistiming Δ t that calculates in the 5th step, according to formula (4), can calculate the flow velocity V of detected fluid.
The 7th step: utilize the flow velocity V of the detected fluid that draws in the 6th step, according to formula (5), can calculate fluid flow Q.
Embodiment: setting fluid line interior diameter to be measured is 3m, the path of ultrasonic propagation is 5m, the flow direction angle of hyperacoustic direction of propagation and fluid is 36.87 °, the velocity of propagation of ultrasound wave in fluid is 1600m/s, 13 Barker code bursts that the code generator generates are [1 111 1-1-1 1 1-1 1-1 1], the different delayed time that produces simultaneously 13 Barker code reference signals be 2500 μ s, 2501 μ s, 2502 μ s ..., 3500 μ s.
The first step: the first ultrasonic transducer 1 and the second ultrasonic transducer 2 are arranged on respectively the both sides of pipeline tube wall and mutually stagger; Code generator 7 produce 13 Barker code signals and from 13 different time delayses that the Barker code signal is corresponding, will be from different time delayses corresponding to 13 Barker code signals as different reference signals, and the corresponding different time; Code generator 7 will produce 13 Barker code signals and pass to respectively the first ultrasonic transducer 1 and the second ultrasonic transducer 2, and pass to respectively the first correlator 3, the second correlator 4 with reference to signal;
Second step: the first ultrasonic transducer 1 and the second ultrasonic transducer 2 produce 13 Barker code signals as transmitting terminal transmitter code generator simultaneously;
The 3rd step: the first ultrasonic transducer 1 receives the signal of the second ultrasonic transducer 2 emissions as receiving end, and the second ultrasonic transducer 2 receives the signal of the first ultrasonic transducer 1 emission as receiving end;
The 4th step: in the first correlator 3, time delays is the reference signal output ultimate range autocorrelation function peak value of 3156 μ s, therefore the travel-time that arrives the first ultrasonic transducer 1 that transmits that records the second ultrasonic transducer 2 is 3156 μ s, i.e. adverse current travel-time t
2Be 3156 μ s; In the second correlator 4, time delays is the reference signal output ultimate range autocorrelation function peak value of 3094 μ s, therefore the travel-time that arrives the second ultrasonic transducer 2 that transmits that records the first ultrasonic transducer 1 is 3094 μ s, i.e. following current travel-time t
1Be 3094 μ s.Wherein display output apart from autocorrelation function as shown in Figure 6.
The 5th step: the mistiming Δ t that calculates the propagation of ultrasound wave co-current flow and counter-current flow is 62 μ s.
The 6th step: according to formula (4), the flow velocity V that can calculate detected fluid is 19.84m/s.
The 7th step: according to formula (5), can calculate fluid flow Q is 140.2406m
3/ s.
Claims (4)
1. device for detecting difference when the phase encoding for ultrasonic flow meter is synchronous, comprise: the first ultrasonic transducer (1), the second ultrasonic transducer (2), the first correlator (3), the second correlator (4), the first display (5), second display (6), code generator (7), it is characterized in that: the first ultrasonic transducer (1) and the second ultrasonic transducer (2), be bolted on the both sides of fluid line tube wall and mutually stagger, the interior diameter of pipeline is D, the path of ultrasonic propagation is L, and L＞D, the flow direction angle of the direction of ultrasonic propagation and fluid is θ, 0 °＜θ＜90 ° wherein, the first ultrasonic transducer (1) is connected with the first correlator (3), the second ultrasonic transducer (2) is connected with the second correlator (4), the first correlator (3) is connected with the first display (5), the second correlator (4) is connected with second display (6), the code generator (7) respectively with the first ultrasonic transducer (1), the second ultrasonic transducer (2), the first correlator (3), the second correlator (4) connects.
2. device for detecting difference when a kind of phase encoding for ultrasonic flow meter according to claim 1 is synchronous is characterized in that: the first ultrasonic transducer (1) and the second ultrasonic transducer (2) are identical ultrasonic transducer; The first correlator (3) and the second correlator (4) are two identical correlators; Display (5) and display (6) are two identical displays.
3. device for detecting difference when a kind of phase encoding for ultrasonic flow meter according to claim 1 is synchronous is characterized in that: correlator is comprised of some identical branch circuit parallel connections, and every multiplier of route and a low-pass filter are composed in series.
4. when synchronous based on a kind of phase encoding for ultrasonic flow meter claimed in claim 1, the detection method of device for detecting difference, is characterized in that, step is as follows:
The first step: the code generator produce 13 Barker code signals and from 13 different time delayses that the Barker code signal is corresponding, will be from different time delayses corresponding to 13 Barker code signals as different reference signals, and the corresponding different time; Code generator (7) will produce 13 Barker code signals and pass to respectively the first ultrasonic transducer (1) and the second ultrasonic transducer (2), and pass to respectively the first correlator (3), the second correlator (4) with reference to signal;
Second step: the first ultrasonic transducer (1) and the second ultrasonic transducer (2) produce 13 Barker code signals as transmitting terminal transmitter code generator simultaneously;
The 3rd step: the first ultrasonic transducer (1) receives the signal of the second ultrasonic transducer (2) emission as receiving end, and the second ultrasonic transducer (2) receives the signal of the first ultrasonic transducer (1) emission as receiving end;
The 4th step: in correlator, identical with the time delay of code generator when 13 travel-times of Barker code signal in fluid that receive, the output signal of this branch road is maximum, the main peak of respective distances autocorrelation function, this moment, this branch road was the travel-time of ultrasound wave in fluid corresponding time delay, and the following current travel-time is designated as t
1Be designated as t with the adverse current travel-time
2
The 5th step: calculate the mistiming Δ t=t that the ultrasound wave co-current flow and counter-current flow is propagated
2-t
1
The 6th step: utilize the mistiming Δ t that calculates in the 5th step, according to
Can calculate the flow velocity V of detected fluid, wherein c is the velocity of propagation of ultrasound wave in fluid media (medium);
The 7th step: utilize the flow velocity V of the detected fluid that draws in the 6th step, according to
Can calculate fluid flow Q, wherein D is the interior diameter of fluid line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100473956A CN103162752A (en) | 2013-02-06 | 2013-02-06 | Detection device and method for phase encoding synchronous time difference of ultrasonic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100473956A CN103162752A (en) | 2013-02-06 | 2013-02-06 | Detection device and method for phase encoding synchronous time difference of ultrasonic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103162752A true CN103162752A (en) | 2013-06-19 |
Family
ID=48586027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100473956A Pending CN103162752A (en) | 2013-02-06 | 2013-02-06 | Detection device and method for phase encoding synchronous time difference of ultrasonic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103162752A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106030255A (en) * | 2014-02-24 | 2016-10-12 | 通用电气公司 | Ultrasonic signal transmitting and receiving circuit assembly and ultrasonic system and method using the same |
| CN107290564A (en) * | 2017-07-28 | 2017-10-24 | 电子科技大学 | A kind of ultrasonic flow-velocity measuring method based on phase difference |
| CN108872630A (en) * | 2018-07-17 | 2018-11-23 | 江苏大学 | It is a kind of can remote control flow velocity measuring device |
| CN109084854A (en) * | 2018-09-13 | 2018-12-25 | 黄伟 | A kind of vehicle fuel charging recorder |
| CN110146135A (en) * | 2019-04-16 | 2019-08-20 | 艾特仪表科技（深圳）有限公司 | A kind of ultrasonic water meter flow measurement circuit and measurement method |
| CN110792424A (en) * | 2019-10-28 | 2020-02-14 | 中国海洋石油集团有限公司 | External axial type ultrasonic flow measurement device and method |
| CN112649055A (en) * | 2019-10-12 | 2021-04-13 | 新开普电子股份有限公司 | Ultrasonic gas flow measuring method and device |
| CN112649056A (en) * | 2019-10-12 | 2021-04-13 | 新开普电子股份有限公司 | Ultrasonic gas flow measuring method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320809A (en) * | 2000-04-24 | 2001-11-07 | 昌民技术有限公司 | Ultrasonic flow rate measurer |
| CN1346191A (en) * | 2000-09-29 | 2002-04-24 | 华为技术有限公司 | Self-adaptive threshold pseudo-random code catching and identifying method |
| CN1804557A (en) * | 2006-01-24 | 2006-07-19 | 天津大学 | Signal processing method of propagation speed differential type ultrasonic flowmeter |
| CN101162164A (en) * | 2007-11-16 | 2008-04-16 | 浙江理工大学 | Frequency modulation wave marking method for time-difference process ultrasonic flowmeter |
| CN201255644Y (en) * | 2008-08-08 | 2009-06-10 | 国网电力科学研究院 | Synchronous transceiving time difference type supersonic flowmeter |
| CN101458326A (en) * | 2007-12-14 | 2009-06-17 | 南京理工大学 | Life detecting device based on pseudocode phase-modulated continuous wave system |
| CN203069223U (en) * | 2013-02-06 | 2013-07-17 | 南京理工大学 | Synchronous phase code time difference detection device for ultrasonic flowmeter |
-
2013
- 2013-02-06 CN CN2013100473956A patent/CN103162752A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320809A (en) * | 2000-04-24 | 2001-11-07 | 昌民技术有限公司 | Ultrasonic flow rate measurer |
| CN1346191A (en) * | 2000-09-29 | 2002-04-24 | 华为技术有限公司 | Self-adaptive threshold pseudo-random code catching and identifying method |
| CN1804557A (en) * | 2006-01-24 | 2006-07-19 | 天津大学 | Signal processing method of propagation speed differential type ultrasonic flowmeter |
| CN101162164A (en) * | 2007-11-16 | 2008-04-16 | 浙江理工大学 | Frequency modulation wave marking method for time-difference process ultrasonic flowmeter |
| CN101458326A (en) * | 2007-12-14 | 2009-06-17 | 南京理工大学 | Life detecting device based on pseudocode phase-modulated continuous wave system |
| CN201255644Y (en) * | 2008-08-08 | 2009-06-10 | 国网电力科学研究院 | Synchronous transceiving time difference type supersonic flowmeter |
| CN203069223U (en) * | 2013-02-06 | 2013-07-17 | 南京理工大学 | Synchronous phase code time difference detection device for ultrasonic flowmeter |
Non-Patent Citations (2)
| Title |
|---|
| 杨荔罡等: "相关器在多普勒引信信号检测中的应用与研究", 《弹箭与制导学报》 * |
| 蒲诚等: "不同编码激励的超声气体流量测量性能对比", 《天津大学学报》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106030255A (en) * | 2014-02-24 | 2016-10-12 | 通用电气公司 | Ultrasonic signal transmitting and receiving circuit assembly and ultrasonic system and method using the same |
| CN107290564A (en) * | 2017-07-28 | 2017-10-24 | 电子科技大学 | A kind of ultrasonic flow-velocity measuring method based on phase difference |
| CN107290564B (en) * | 2017-07-28 | 2020-02-04 | 电子科技大学 | Phase difference-based ultrasonic flow velocity measurement method |
| CN108872630A (en) * | 2018-07-17 | 2018-11-23 | 江苏大学 | It is a kind of can remote control flow velocity measuring device |
| CN109084854A (en) * | 2018-09-13 | 2018-12-25 | 黄伟 | A kind of vehicle fuel charging recorder |
| CN110146135A (en) * | 2019-04-16 | 2019-08-20 | 艾特仪表科技（深圳）有限公司 | A kind of ultrasonic water meter flow measurement circuit and measurement method |
| CN112649055A (en) * | 2019-10-12 | 2021-04-13 | 新开普电子股份有限公司 | Ultrasonic gas flow measuring method and device |
| CN112649056A (en) * | 2019-10-12 | 2021-04-13 | 新开普电子股份有限公司 | Ultrasonic gas flow measuring method and device |
| CN110792424A (en) * | 2019-10-28 | 2020-02-14 | 中国海洋石油集团有限公司 | External axial type ultrasonic flow measurement device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103162752A (en) | Detection device and method for phase encoding synchronous time difference of ultrasonic flowmeter | |
| CN103868555A (en) | Circulatory time difference detection method for ultrasonic flow meter | |
| CN103090916B (en) | Ultrasonic flow measurement device and ultrasonic flow measurement method | |
| CN102749107B (en) | High precision time difference formula monopulse ultrasonic flowmeter system and measuring flow method thereof | |
| CN104501889B (en) | Detection method based on cross-correlation Time-difference Ultrasonic Flow | |
| CN101004353A (en) | Detection method of time difference cross in use for ultrasonic flowmeter | |
| CN105157771A (en) | Time difference type supersonic wave flow measuring method and device | |
| CN102261937A (en) | High-accuracy time-difference type ultrasonic flow meter and method for measuring flow thereof | |
| CN102589627B (en) | Absolute propagation time measuring method for ultrasonic flow meter | |
| CN203848888U (en) | Ultrasonic flowmeter probe with transmitting angle adjustable | |
| WO2012081195A1 (en) | Flow volume measuring device | |
| CN101598580B (en) | Method for improving precision of transit-time ultrasonic flow meter | |
| CN203069223U (en) | Synchronous phase code time difference detection device for ultrasonic flowmeter | |
| CN102866261B (en) | Method for detecting flight time of ultrasonic wave in flow speed measurement | |
| CN105180853A (en) | Electromagnetic ultrasonic metal material thickness measurement method | |
| CN104457871A (en) | Flowmeter and fluid measurement method | |
| CN102914333B (en) | Detection method of using ultrasonic waves for flow detection | |
| CN102829829B (en) | A kind of Time-difference Ultrasonic Flow detection method and device | |
| CN102829830B (en) | Method and the device of ultrasonic propagation velocity is detected in detecting for ultrasonic flow | |
| CN203148479U (en) | Ultrasonic flow measuring device | |
| CN102102511A (en) | Underground ultrasonic Doppler flow measurement device and measurement method | |
| CN102023038B (en) | Ultrasonic measurement method for pipeline flux | |
| CN116295149A (en) | Pipeline bubble size measurement system based on time difference type ultrasonic flowmeter | |
| CN202229790U (en) | Single track correlation method ultrasonic gas flow meter | |
| CN104964718A (en) | Small flow ultrasonic flow system and measuring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130619 |